40543031 has 2 divisors, whose sum is σ = 40543032. Its totient is φ = 40543030.

The previous prime is 40543007. The next prime is 40543033. The reversal of 40543031 is 13034504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40543031 - 2²² = 36348727 is a prime.

It is a super-2 number, since 2×40543031² = 3287474725333922, which contains 22 as substring.

Together with 40543033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40542994 and 40543012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40543033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20271515 + 20271516.

It is an arithmetic number, because the mean of its divisors is an integer number (20271516).

Almost surely, 2^40543031 is an apocalyptic number.

40543031 is a deficient number, since it is larger than the sum of its proper divisors (1).

40543031 is an equidigital number, since it uses as much as digits as its factorization.

40543031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 40543031 is about 6367.3409677824. The cubic root of 40543031 is about 343.5358548977.

Adding to 40543031 its reverse (13034504), we get a palindrome (53577535).

The spelling of 40543031 in words is "forty million, five hundred forty-three thousand, thirty-one".